Abstract:
This is a nationally managed database of the Soil Survey Laboratory (SSL), National Soil Survey Center, currently containing analytical data for more than 20,000 pedons of U.S. soils and about 1,100 pedons from other countries. Standard morphological pedon descriptions are available for about 15,000 of these pedons. Partial data for pedons currently being analyzed may be unavailable. Soil ... fertility measurements, such as those made by Agricultural Experimental Stations, were not made.

Collection Organization: Members of the National Cooperative Soil Survey program.

Collection Methodology: Most of the data were obtained over the last 40 years. About 3/4 of the data are less than 20 years old. Analytical data for most of the pedons are fairly complete, according to the prevailing view of the research and characterization needs when the pedon was sampled. Generally, the types of analyses have increased over time.

Collection Frequency: Data are collected as needed, as part of an ongoing National Cooperative Soil Survey (NCSS) program.

Update Characteristics: The types or amounts of data updated are variable. In the update process, data may be added, or deleted from the database.

STATISTICAL INFORMATION:

For National Coverage: 200 to 250 MB. The database contains from 250,000 to 275,000 logical records. A record consists of an individual mapunit record. LANGUAGE: